Ultrasonic motor transmission system

ABSTRACT

The invention covers a system for driving transmission members, particularly made from glass and of a relatively small diameter, at an ultrasonic rate in which the transmission member is coupled to a base member by means of an epoxy, swaging, or a combination thereof. In addition an ultrasonic motor system including an ultrasonic motor, and transmission assembly for use with a receptacle is also disclosed.

QR 3959ln862 [72] Inventor Ronald H. Winston New York, N.Y. [21] Appl.No. 2,146 [22] Filed Jan. 12,1970, [451 Patented July 6, I971 [73]Assignee Ultrasonic Systems, Inc.

Farmingdale, N.Y.

[54] ULTRASONIC MOTOR TRANSMISSION SYSTEM 21 Claims, 10 Drawing Figs.

[52] US. CL BIO/8.2, 51/59 SS, 259/1 R, 259/100, 259/1 17, 259/016. 15,259/D1G. 30. 259/D1G. 41, 310/8.3, 310/26 [51] lnt.Cl [101v 7/00, HOlv9/00 [50] Field oISearch 1110/82, 8.3, 26; 51/56, 59;259/95,100,116,117, DIG. 44, DIG. 41; 222/196-202 [56] Referenca Cited UNITEDSTATES PATENTS 2,514,080 7/1950 Mason 310/8.2 X 2,680,333 6/1954 Calosi310/26 X SEARCH ROOM Primary Examiner-Milton O. I-Iirshfield AssistantExaminer-Mark O. Budd Attorney-Leonard W. Suroff ABSTRACT: The inventioncovers a system for driving transmission members, particularly made fromglass and of a relatively small diameter, at an ultrasonic rate in whichthe transmission member is coupled to a base member by means of anepoxy, swaging, or a combination thereof. In addition an uI- trasonicmotor system including an ultrasonic motor, and transmission assemblyfor use with a receptacle is also disclosed.

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PATENIEH JUL 8197! F I G GEN.

' N I MOTOR 4 ULTRAS (M FNTOR. RONALD H. WINSTON ATTORNEY PATENTEHJULsum 3.591.862

SHEU 2 OF 3 INYFIN'IOR. RONALD H. WINSTON ATTORNEY ATENTED JUL 6 Ian4201 m4 256: 77d 75d 1 79d 5 d i E 46d 1 f 32d SHHI 3 UP 3 FIG. 7

27c 74c 28c 73c 70c 34c 72c 46c INYENTOR. RONALD H. WINSTON BY A)ATTORNEY ULTRASONIC MOTOR TRANSMISSION SYSTEM BACKGROUND OF THEINVENTION This invention, relates to an ultrasonic motor system and atransmission assembly which may be used therewith for transmitting highfrequency mechanical vibrations for performing certain processes.

The present invention solves the problems of introducing ultrasonicvibrations into a heated receptacle or flask which is under reflux orany other condition which requires sealing from the external atmosphereand/or might contain corrosive or highly reactive agents. This wouldalso include gaseous reactions and reactions of two immiscible phasesfor which mechanical stirring or agitation is insufficient to causeinterfacial contact for reaction. Attempts were made to insert thereceptacle in an ultrasonic tank but it was found cumbersome and if awide range of temperature was needed it would have an effect on thepiezoelectric driving elements. Furthermore,

-the insertion of a metallic vibratory transmission member into thefluid medium often caused corrosion and contamination of the receptaclecontents.

The present invention also deals with the solution of the problem oftransmitting ultrasonic vibrations for use as a disperser in whichmixtures of liquid or liquids and solids are dispersed to formsuspensions, emulsions, and the like under the influence of ultrasonicvibrations and where it is desired to have an energy transmission memberof minimum diameter. Various applications of ultrasonic energy requirethe tool or transmission member to be of a small diameter where it isnot practical or feasible to use the method of a threadedportion forcoupling to an ultrasonic motor. For example, when it is desired to useglass as the material for the transmission member then a threadedcoupling is not always feasible due to the problems inherent inmachining glass or forming it with a fine enough screw thread toproperly transmit ultrasonic vibrations. The same holds true forrelatively thin plastic and metallic tool members.

OBJECTS OF THE INVENTION An object of the invention is to provide anultrasonic transmission assembly for transmitting ultrasonic mechanicalvibrations from an ultrasonic motor to a glass or relatively thintransmission member.

Another object is to provide an ultrasonic motor system for transmittingultrasonic mechanical vibrations to a glass or relatively thintransmission member capable of being inserted in a receptacle andmounted in sealed relation to the opening therein.

Other objects and advantages of the present invention will be obvious asthe disclosure proceeds.

SUMMARY OF THE INVENTION In accordance with one aspect of the presentinvention an ultrasonic transmission assembly consists of base memberadapted to be connected to an ultrasonically vibrated driving member orultrasonic motor, that may be hand held or mounted in a fixed position,and the base member is fixed to the driving member substantially in theregion of high frequency vibration, for example, a loop of longitudinal,torsional, or radial vibration. In this manner the base member isvibrated at a frequency and amplitude which substantially corresponds tothe frequency and amplitude of vibration of the driving member to whichthe base is secured. The means for coupling the base member to theenergy transmission or tool member, as well as the length, diameter andcomposition of the tool member all play aninterrelated role on thefrequency of the overall system.

In the illustrated preferred embodiments ofthe invention, as will behereafter more fully described, coupling means are provided to firmlysecure the terminal end of the transmission member to the base memberwhereby vibratory motion is im' parted to the transmission member. Toreceive the transmission member an aperture which extends substantiallyperpendicular to the face surface of the base member is provided forreceiving an end of said transmission member. A bonding agent in theform of an epoxy cement couples the base member to the transmissionmember so that a proper transmission of the high frequency mechanicalvibrations induced in the base member is transmitted to the tool member.

A feature of the invention resides in the arrangement of the bondingagent within the aperture and in surrounding relation to the terminalend of the tool member so that a maximum amount of energy is transmittedwith a minimal of loss in the form of heat. The bonding agent in theform of epoxy provides a joining or coupling of the generally glass toolmember to the base member. This coupling is generally in a transitionarea with the tubular sections in telescopic relation to each other andan epoxy layer between the transmission member and base member. Thetubular sections may be designed so that the base member extends insurrounding relation to the transmission member.

Another feature of the invention resides in the provision of means foracoustically mounting and sealing the tool member relative-to an openingin a receptacle with the tool member extending therein for introducingthe high frequency mechanical vibrations within the medium contained inthe receptacle. The sealing means may include a stopper or plug adaptedto fit within the receptacle opening and having an axial bore throughwhich the transmission member extends with an O- ring extending in aseat provided within the axial bore or on the transmission member,without acoustically loading the transmission member.

Still another feature of the, present invention is the arrangement andinterrelationship of the ultrasonic motor and transmission assembly toform an ultrasonic motor system to obtain the selective application ofhigh frequency mechanical vibrations through a glass, plastic ormetallic tool without fatigue fractures thereof.

BRIEF DESCRIPTION OF THE DRAWINGS Although the characteristic featuresof this invention will be particularly pointed out in the claims, theinvention itself, and the manner in .which it may be made and used, maybe better understood by referring to the following description taken inconnection with the accompanying drawings forming a part hereof, whereinlike reference numerals refer to like parts throughout the severalviews'and in which:

FIG. 1, is a assembled view, in partial cross section of an ultrasonicmotor system according to the present invention;

FIG. 2, is-a section view of the ultrasonic transmission assembly;

FIG. 3, is an exploded view of the ultrasonic transmission assembly;

FIG. 4, is an enlarged section view of a stopper for position- ,ingwithin a receptacle;

FIG. 5, is an enlarged sectional view illustrating the manner PREFERREDEMBODIMENTS OF THE INVENTION Turning now to FIGS. 1-4, we have theultrasonic transmission system generally referred to by numeral 10 andseen to include an ultrasonic motor 11 having a driving member 12extending therefrom for transmitting the ultrasonic vibrations asindicated by arrow 14 to the transmission system or as sembly l5.

The ultrasonic motor 11 may be powered by generator 16 and connected byelectrical cable 17, the generator is an oscillator adapted to produceelectrical energy having an ultrasonic frequency. The ultrasonic motor11, may be in the form of a driving member adapted for being hand heldas by an operator and generally comprising a tubular housing or casingfrom which the driving element 12 extends. The transducer in theultrasonic motor 11 is longitudinally dimensioned so as to have lengthswhich are whole multiple of halfwavelengths of the compressional wavesestablished therein at the frequency of the alternating current suppliedso that longitudinal loops of motion occur at the end of the drivingelement 12. Thus, the optimum amplitude of longitudinal vibration andhyperaccelerations of driving element 12 is achieved, and such amplitudeis determined by the relationship of the masses which may be madeeffective to either magnify or reduce the amplitude of the vibrationsreceived from the transducer.

The ultrasonic motor 11 may be retained in a fixed position for extendedperiods of time by mounting means 20 which may be in the form of a standon which the motor rests or as schematically illustrated it may be inthe form of an arm 21 extending outwardly from a fixed support 22.

The transmission assembly includes a base member which may be formed ofany suitable material capable of supporting ultrasonic vibrations,generally metallic, and adapted to be set into vibration in a givendirection at ultrasonic frequencies, and is rigidly affixed tothe'forward end of the driving member 12 by securing means 26 which mayconsist of a threaded fastener 27 extending from the rear end 28 of basemember 25 and a complementary threaded recess 29 in the driving member12 to properly couple the vibratory motion unimpeded to the base member25 and consequently to the transmission or tool member 40 mountedtherein. An aperture or recess 32 extends inwardly from the front end 33of the base member 25 and is defined by a downwardly extending skirt orrim 34 terminating in a bottom edge or surface 35; The base member 25has an axial length which is usually less than a quarter wavelength atthe frequency of longitudinal vibration thereof.

Certain features of the invention can best be explained'in terms of thediameter, D, of the transmission member 40 and depth, L, of recess 32,and diameter, S, of the recess so that a defined thickness, T, remainsbetween the diameter, D, and recess diameter, S, and depth, L, and depthofinsertion, X, to assure that the coupling means 45 properly transmitsthe vibrations induced in the base member 15. The tool member 40 has aterminal end 42 positioned within the recess 32 and an output or freeend 43 in axial spaced relation thereto with an outer surface 44.

The transmission member is embedded or cast within the bonding agent 46to guarantee a sufficient coupling of the vibratory energy. A depth ofinsertion, X, within the bonding agent of about 0.60 inch has been foundsatisfactory for a glass tool member 40 ranging in diameter from 0.10 to1.0 inch. The range of insertion may be approximately from 0.06 to 2.0inch, but as great as inches for certain applications. Accordingly, fora diameter, D, in the range of 0.10 to 2.0 inch the recess diameter, S,may in each instance exceed the diameter, D, by at least 0.002 inch toleave a minimum thickness, T, of 0.001 inch. The range of thickness, T,may be generally from .0005 to 0.50 inch, but preferably from 0.002 to0.1000 inch for a diameter, D, of less than one inch. For diameters ofD, in say excess of one inch the dimensions are selected accordingly.The layer of bonding agent 46 is in the form of an epoxy which iscapable of supporting ultrasonic vibrations and firmly securing the endof the transmission member 30 to the base member so that the ultrasonicmechanical vibratory motion is imparted to the transmission member 40. Asuitable bonding agent for this purpose is manufactured by the ShellChemical Company and is designated as Epibond 123 used with aconventional hardener. When the transmission member 40 is made of glass,Pyrex has proven satisfactory since it is inert and strong, this is notto exclude using ceramic or other glass compositions. The transmissionmember 40 may also be made from a plastic or metallic material andcoupled to the base member in the various forms described herein. inparticular when a metallic or plastic tool member is used of a smallcross section or diameter it is not always practical to form a threadthereon. For ex ample, tools having a diameter in the range 0.060 to0.20 inch are more suitably joined to a base member by the couplingmeans described herein. Obviously, larger diameter tools may also becoupled as described herein.

The transmission assembly 15 may be used for a number of applications inwhich it is desired to transmit the vibratory energy to perform usefulwork. When a glass tool member 40 is used an ideal application is foruse in chemical processes in which it is desired to immerse the free end43 of the transmission member within a receptacle or flask 48 having afluid 50 contained therein with an opening 52 at one end thereof. Thereceptacle may be supported on a surface 49.

Sealing means 55 is provided between the opening 52 at the neck 54 andthe transmission member 40 to provide the required seal. One form ofsealing means may be that of a ring seal that is either in the sidewall, top or bottom of the receptacle so that the transmission assemblyis essentially permanently secured to the receptacle. As seen in FIGS. 3and 4, a stopper or bushing 56 which may be made of rubber or a plasticsuch as Nylon or Teflon having an outer tapered surface to coincide withthe taper at the neck 54 has a passageway or bore 60 extendingtherethrough with a radial O-ring seat or depression 61 containedtherein. In like manner the transmission member 40 may have a matingO-ring seat 62 which is adapted to receive therein a gasket or O-ring64. The O-ring 64 is preferably mounted a distance Y from the output end43 such that it is situated at a nodal plane or section at the frequencyof longitudinal vibration of the transmission member 40. The O-ring 64snap fits into the seats 61 and 62 and the bushing 56 then slides into astandard tapered ground glass joint for chemical glassware. A simplestraight bushing can be used without an O-ring if the seal in the flaskis not crucial.

Accordingly, as illustrated in FIGS. l-4, a complete motor system) isdescribed that may be conveniently used to transmit ultrasonicmechanical vibrations through a transmission member which may havevarious cross-sectional configurations since a threaded joint is notrelied upon. In addition glass, ceramic, sapphire and diamond,transmission members of various diameters may be induced to vibrate atultrasonic frequencies for performing various experiments and processes.The transmission member may'be designed to magnify the amplitude ofvibration between its input and output surfaces in a well known manner.The transmission member may also be tubular in the form of a cylinder.

FIGS. 5-10, illustrate other forms of the transmission assembly that maybe used in the overall transmission system. Referring to FIG. 5, we havea transmission assembly in which the vibratory energy as indicated bythe mechanical vibration arrow 14a extends in a plane perpendicular tothe direction of motion. The base member 250 has a recess 32a extendingfrom the front end 3311 and which accommodates the transmission member40a which has a projection or finger 65a extending from the rear end 420and terminating in face 66a. The securing means may be in the form of athreaded fastener 27a. in this manner the outside diameter of the basemember 25a and tool member 404 may be the same, with the coupling meansin the form of the bonding agent 46a extending therebetween. Thevertically extending portions or layers of bonding agent 46a are not atthe outer surface of the joint but contained between horizontal portionswhere the vibrations are transmitted by compressional waves through theradially extending bonding agent 46a.

P16. 6, illustrates 'a transmission assembly 10b in which the basemember 25b has a threaded opening 68b at its rear end 281; with adownwardly extending skirt 34b having an inwardly flared portion 70b andterminating in a front end 3312. The transmission member 4% has a fronttapered or conical section extending inwardly between the ledge 71bandfree end 43b to obtain an increase of the amplitude of longitudinalvibrations in accordance with known methods of amplitude magnification.The rear section of the tool member 4017 has a tapered body or conicalsection 72b extending inwardly and a straight shank portion 73bterminating in a rounded or beveled edge 74b which merges with face661). The body portion 70b is initially straight until it is assembledwith the tool member 40b so that the rear section extends coaxiallywithin the recess 32b and the section 70b is swaged into intimatecontact with the tool member 40b. The intimate contact between basemember 25b which may be metallic, and tool member 40b which may beglass, permits the mechanical vibrations to be transmitted through theinterface of the contacting areas.

FIG. 7, is similar to P10. 6, with the transmission assembly 100 havinga threaded fastener 27c extending from the rear face 28:: with adownwardly extending skirt 340 having an inwardly flared portion 700 andterminating in a front end 33c. The transmission member 40c, in the formof an acoustical impedance transformer, has an amplitude magnificationgain built into it by having an upper cylindrical section of greaterdiameter than the lower cylindrical section, as in accordance with U.S.Pat. Re 25,033. In this manner the amplitude of vibration is greater atthe output end 43c than at the rear ledge 710. The rear section of thetool member 406 has a tapered body 72c and a straight shank portion 730terminating in a rounded or beveled edge 740. The coupling means is inthe form of a layer of bonding agent 46c interposed between the matingsurfaces as seen in FIG. 7. ln this manner the bonding agent 46c firmlyretains the overlapping portions of the base member 25c and tool member400 in energy transferring relation to each other transmitting theultrasonic mechanical vibration, defined herein as vibrations in therange of 1,000 cycles per second to l ,000,000 cycles per second.

FIG. 8, illustrates a transmission assembly d having retaining means 75din the recess 32d of base member d, in the form of annular rings havingcrests 76d and depressions 77d starting from the terminal end 42d andextending to the front end 33d. The transmission member 40d may besimilarly provided with complimentary retaining means in the form ofcorrugations formed by crests 78d and depressions 79d that may beblended together by curved portions. The retaining means increases thearea of contact for the bonding agent 46d which forms the coupling meansto obtain the proper transmission of the vibratory energy. Therespective configurations of the retaining means may take various formsand shapes.

FIG. 9, illustrates a transmission assembly 10a in which the base member25:: may be of extended longitudinal length and substantially equal to ahalf wavelength of the frequency of vibration and having the base memberc secured thereto by v the bonding agent 46c. For certain applicationsonly the tip need be of say, glass and therefore the remaining extent ofthe transmission assembly 10:: may be of some other material, such asmetal. The base member 40s may include a finger 65e extending from theterminal end 42:: in spaced relation to the front end 33e of the basemember 25e. The finger 65e extends within recess 32c with the energytransmitted to the free end 43e. The size and shape of the finger 65cmay vary as desired.

F l6. 10, illustrates a transmission assembly 10f in which the recess32f extends through the base member 25f between its front end 33fandrear end 28f. The transmission member 40f is contained within the recess32f and coupled to the base member by means of the bonding agent 46f.The securing means of the driving element has an exterior threadedportion 80f engaging an internal threaded portion 81f, with a projectionor tip 82f extending therefrom in engagement with the terminal end 42fof the tool member 40f. In this manner the vibratory energy istransmitted to the base member 25f through the threaded engagingportions and in turn through the bonding agent 46fto the tool member40f. ln addition, the

contact coupling between the tip 82f and its engagement with the rearend 42f of the transmission member 40f. To permit rotation of thetransmission assembly 10f relative to the driving member 12f grippingmeans may be provided, as for example, in the form of spaced apart flats83f on the circular outer surface. v

Although illustrative embodiments of the invention have been describedin detail herein with reference to the accompanying drawings it is to beunderstood that the invention is not limited to those preciseembodiments, and that various changes and modifications may be effectedtherein without departing from the scope or spirit of the invention.

lclaim:

1. An ultrasonic transmission assembly for use with an ultrasonicdriving member, comprising:

A. an energy transmission member, having a longitudinal lengthsubstantially greater than the largest diameter defined by itscross-sectional, area for transmitting vibrations along its longitudinallength,

B. a base member capable of supporting ultrasonic vibrations and adaptedto be set into vibration in a given direction at ultrasonic frequencies,said base member being provided with an aperture for receiving an end ofsaid transmission member, and having an axial length less than a quarterwavelength at the frequency of longitudinal vibration thereof, with saidtransmission member extending axially within said aperture a distance inthe range of 0.06 to 2.0 inch,

C. means for connecting said base member to said driving member, saidmeans including a threaded portion for mating with a similarly threadedportion on the driving member, and g D. means for coupling thevibrations induced in said base member to said transmission member, saidcoupling means includes a layer of bonding agent in said aperturebetween said transmission member and said base member capable ofsupporting ultrasonic vibrations for firmly securing the end of saidtransmission member to the base member, said layer of bonding agenthaving a thickness in the range of 0.0005 to 0.50 inch, wherebyultrasonic vibratory motion is imparted to said transmission member.

2. An ultrasonic transmission assembly as defined in claim 1, andfurther including retaining means contained within said aperture or onsaid transmission member.

3. An ultrasonic transmission assembly as defined in claim 2, whereinsaid transmission member positioned within said aperture includes aplurality of spaced apart annular crests and depressions blendedtogether, wherein the area of contact for said bonding agent isincreased.

4. An ultrasonic transmission assembly as defined in claim 11, whereinsaid transmission member is of a glass material.

5. An ultrasonic transmission assembly as defined in claim 1, whereinsaid transmission member is of a plastic material.

6. An ultrasonic transmission assembly as defined in claim 1, whereinsaid transmission member is of a metallic material.

7. An ultrasonic transmission assembly as defined in claim 1, whereinsaid transmission member is of a ceramic material 8. An ultrasonictransmission assembly as defined in claim 1, wherein Y a. said apertureextends axially through said base member between opposite ends thereof,and means for connecting said base member to said driving member so thelatter is adapted to extend within said aperture in contacting pressuralrelationship to said transmission member, wherein the mechanicalvibrations of said driving member are transmitted to said transmissionmember through said coupling means and said contacting pressuralrelationship.

9. An ultrasonic transmission assembly as defined in claim 1, andfurther including gripping means provided on said base mechanicalvibrations are also transmitted via the pressure member.

10. An ultrasonic transmission assembly as defined in claim 1, whereinsaid transmission member has a projection extending within said apertureand a rear surface in spaced relation to the front end of said basemember so that said bonding agent also extends radially between saidspaced apart rear surface and said front end.

11. An ultrasonic transmission assembly as defined in claim 1, whereina. said transmission member is provided with a tapered section extendinginwardly at the end thereof, and

b. said base member has an inwardly flared portion extending coaxiallyin spaced relation to said tapered section; and said layer of bondingagent extends therebetween.

12. An ultrasonic motor system, comprising:

A. an ultrasonic motor having a driving member,

B. a glass energy transmission member, having a longitudinal lengthsubstantially greater than the largest diameter defined by itscross-sectional area for transmitting vibrations along its longitudinallength,

C. a base member capable of supporting ultrasonic vibrations and adaptedto be set into vibration in a given direction at ultrasonic frequencies,said base member being provided with an aperture for receiving an end ofsaid transmission member, with said transmission member extendingaxially within said aperture a distance in the range of 0.06 to 2.0inch,

D. means connecting said base member to said driving member of theultrasonic motor, and

E. means for coupling the vibrations induced in said basemember to saidtransmission member, said coupling means includes a layer of bondingagent in said aperture between said transmission member and said basemember for firmly securing the end of said transmission member to thebase member within said aperture, said layer of bonding agent having athickness in the range of 0.0005 to 0.50 inch, whereby ultrasonicvibratory motion is imparted to said transmission member.

13. An ultrasonic motor system as defined in claim 12, and furtherincluding:

a. a receptacle having an opening therein,

b. means for mounting said ultrasonic motor wherein said transmissionmember extends through said opening and into said receptacle, and

c. means for sealing said transmission member at said opening, saidsealing means including a stopper adapted to fit within said opening andhaving an axial bore through which said transmission member extends withan O-ring extending therebetween.

14. An ultrasonic motor system as defined in claim 13, wherein saidtransmission member is provided with an O-ring seat for receiving saidO-ring.

15. An ultrasonic motor system as defined in claim 14, wherein saidstopper is provided with a mating O-ring seat in said axial bore.

16. An ultrasonic transmission assembly as defined in claim 12, andfurther including retaining means contained on said transmission member,in the form of a plurality of spaced apart annular crests anddepressions blended together to increase the area of contact for saidbonding agent.

17. An ultrasonic transmission assembly as defined in claim 12, whereina. said aperture extends axially through said base member betweenopposite ends thereof, and b, means for connecting said base member tosaid driving member so that the latter is adapted to extend within saidaperture in contacting pressural relationship to said transmissionmember, wherein the mechanical vibrations of said driving member aretransmitted to said transmission member through said coupling means andsaid contacting pressural relationship. 18. An ultrasonic transmissionassembly as defined in claim 12, and further including gripping meansprovided on said base member.

19. An ultrasonic motor system adapted to be positioned within areceptacle having an opening therein, comprising:

A. an ultrasonic motor having a driving member,

B. a glass energy transmission member,

C. a base member capable of supporting ultrasonic vibrations and adaptedto be set into vibration in a given direction at ultrasonic frequencies,said base member being provided with an aperture for receiving an end ofsaid transmission member, and having an axial length less than a quarterwavelength at the frequency of longitudinal vibration thereof, with saidtransmission member extending axially within said aperture a distance inthe range of0.06 to 2.0 inch,

D. means connecting said base member to said driving member of theultrasonic motor,

E means for coupling the vibrations induced in said base member to saidtransmission member, said coupling means includes a layer of bondingagent capable of supporting ultrasonic vibrations for firmly securingthe end of said transmission member to the base member, said layer ofbonding agent having a thickness in the range of 0.0005 to 0.50 inch,whereby ultrasonic vibratory motion is imparted to said transmissionmember,

F. means for mounting said ultrasonic motor wherein said transmissionmember extends through said opening and into said receptacle, and

G. means for sealing said transmission member at said opening, saidsealing means including a stopper adapted to fit within said opening andhaving an axial bore through which said transmission member extends withan O-ring extending therebetween.

20. An ultrasonic motor system as defined in claim 19,

wherein a. said transmission member is provided with a tapered sectionextending inwardly at the end thereof, and

b. said member has an inwardly flared portion extending coaxially inspaced relation to said tapered section, and said layer of bonding agentextends therebetween.

2]. An ultrasonic motor system as defined in claim 19, wherein saidtransmission member has a projection extending within said aperture anda rear surface in spaced relation to the front end of said base member,so that said bonding agent and said front end.

1. An ultrasonic transmission assembly for use with an ultrasonicdriving member, comprising: A. an energy transmission member, having alongitudinal length substantially greater than the largest diameterdefined by its cross-sectional, area for transmitting vibrations alongits longitudinal length, B. a base member capable of supportingultrasonic vibrations and adapted to be set into vibration in a givendirection at ultrasonic frequencies, said base member being providedwith an aperture for receiving an end of said transmission member, andhaving an axial length less than a quarter wavelength at the frequencyof longitudinal vibration thereof, with said transmission memberextending axially within said aperture a distance in the range of 0.06to 2.0 inch, C. meaNs for connecting said base member to said drivingmember, said means including a threaded portion for mating with asimilarly threaded portion on the driving member, and D. means forcoupling the vibrations induced in said base member to said transmissionmember, said coupling means includes a layer of bonding agent in saidaperture between said transmission member and said base member capableof supporting ultrasonic vibrations for firmly securing the end of saidtransmission member to the base member, said layer of bonding agenthaving a thickness in the range of 0.0005 to 0.50 inch, wherebyultrasonic vibratory motion is imparted to said transmission member. 2.An ultrasonic transmission assembly as defined in claim 1, and furtherincluding retaining means contained within said aperture or on saidtransmission member.
 3. An ultrasonic transmission assembly as definedin claim 2, wherein said transmission member positioned within saidaperture includes a plurality of spaced apart annular crests anddepressions blended together, wherein the area of contact for saidbonding agent is increased.
 4. An ultrasonic transmission assembly asdefined in claim 1, wherein said transmission member is of a glassmaterial.
 5. An ultrasonic transmission assembly as defined in claim 1,wherein said transmission member is of a plastic material.
 6. Anultrasonic transmission assembly as defined in claim 1, wherein saidtransmission member is of a metallic material.
 7. An ultrasonictransmission assembly as defined in claim 1, wherein said transmissionmember is of a ceramic material
 8. An ultrasonic transmission assemblyas defined in claim 1, wherein a. said aperture extends axially throughsaid base member between opposite ends thereof, and b. means forconnecting said base member to said driving member so the latter isadapted to extend within said aperture in contacting pressuralrelationship to said transmission member, wherein the mechanicalvibrations of said driving member are transmitted to said transmissionmember through said coupling means and said contacting pressuralrelationship.
 9. An ultrasonic transmission assembly as defined in claim1, and further including gripping means provided on said base member.10. An ultrasonic transmission assembly as defined in claim 1, whereinsaid transmission member has a projection extending within said apertureand a rear surface in spaced relation to the front end of said basemember so that said bonding agent also extends radially between saidspaced apart rear surface and said front end.
 11. An ultrasonictransmission assembly as defined in claim 1, wherein a. saidtransmission member is provided with a tapered section extendinginwardly at the end thereof, and b. said base member has an inwardlyflared portion extending coaxially in spaced relation to said taperedsection, and said layer of bonding agent extends therebetween.
 12. Anultrasonic motor system, comprising: A. an ultrasonic motor having adriving member, B. a glass energy transmission member, having alongitudinal length substantially greater than the largest diameterdefined by its cross-sectional area for transmitting vibrations alongits longitudinal length, C. a base member capable of supportingultrasonic vibrations and adapted to be set into vibration in a givendirection at ultrasonic frequencies, said base member being providedwith an aperture for receiving an end of said transmission member, withsaid transmission member extending axially within said aperture adistance in the range of 0.06 to 2.0 inch, D. means connecting said basemember to said driving member of the ultrasonic motor, and E. means forcoupling the vibrations induced in said base member to said transmissionmember, said coupling means includes a layer of bonding agent in saidaperture between said transmission member and said base member forfirmly securing The end of said transmission member to the base memberwithin said aperture, said layer of bonding agent having a thickness inthe range of 0.0005 to 0.50 inch, whereby ultrasonic vibratory motion isimparted to said transmission member.
 13. An ultrasonic motor system asdefined in claim 12, and further including: a. a receptacle having anopening therein, b. means for mounting said ultrasonic motor whereinsaid transmission member extends through said opening and into saidreceptacle, and c. means for sealing said transmission member at saidopening, said sealing means including a stopper adapted to fit withinsaid opening and having an axial bore through which said transmissionmember extends with an O-ring extending therebetween.
 14. An ultrasonicmotor system as defined in claim 13, wherein said transmission member isprovided with an O-ring seat for receiving said O-ring.
 15. Anultrasonic motor system as defined in claim 14, wherein said stopper isprovided with a mating O-ring seat in said axial bore.
 16. An ultrasonictransmission assembly as defined in claim 12, and further includingretaining means contained on said transmission member, in the form of aplurality of spaced apart annular crests and depressions blendedtogether to increase the area of contact for said bonding agent.
 17. Anultrasonic transmission assembly as defined in claim 12, wherein a. saidaperture extends axially through said base member between opposite endsthereof, and b. means for connecting said base member to said drivingmember so that the latter is adapted to extend within said aperture incontacting pressural relationship to said transmission member, whereinthe mechanical vibrations of said driving member are transmitted to saidtransmission member through said coupling means and said contactingpressural relationship.
 18. An ultrasonic transmission assembly asdefined in claim 12, and further including gripping means provided onsaid base member.
 19. An ultrasonic motor system adapted to bepositioned within a receptacle having an opening therein, comprising: A.an ultrasonic motor having a driving member, B. a glass energytransmission member, C. a base member capable of supporting ultrasonicvibrations and adapted to be set into vibration in a given direction atultrasonic frequencies, said base member being provided with an aperturefor receiving an end of said transmission member, and having an axiallength less than a quarter wavelength at the frequency of longitudinalvibration thereof, with said transmission member extending axiallywithin said aperture a distance in the range of 0.06 to 2.0 inch, D.means connecting said base member to said driving member of theultrasonic motor, E. means for coupling the vibrations induced in saidbase member to said transmission member, said coupling means includes alayer of bonding agent capable of supporting ultrasonic vibrations forfirmly securing the end of said transmission member to the base member,said layer of bonding agent having a thickness in the range of 0.0005 to0.50 inch, whereby ultrasonic vibratory motion is imparted to saidtransmission member, F. means for mounting said ultrasonic motor whereinsaid transmission member extends through said opening and into saidreceptacle, and G. means for sealing said transmission member at saidopening, said sealing means including a stopper adapted to fit withinsaid opening and having an axial bore through which said transmissionmember extends with an O-ring extending therebetween.
 20. An ultrasonicmotor system as defined in claim 19, wherein a. said transmission memberis provided with a tapered section extending inwardly at the endthereof, and b. said member has an inwardly flared portion extendingcoaxially in spaced relation to said tapered section, and said layer ofbonding agent extends therebetween.
 21. An ultrasonic motor system asdefined in claim 19, wherein said transmission member has a projectionextending within said aperture and a rear surface in spaced relation tothe front end of said base member, so that said bonding agent alsoextends radially between said spaced apart rear surface and said frontend.